Wristwatch



FIG. 1 is a top plan view of a wristwatch showing my new design, thedotted line showing of a fragmented strap is for illustrative purposesand forms no part of the claimed design;

FIG. 2 is a right side elevational view;

FIG. 3 is a bottom plan view;

FIG. 4 is a left side elevational view;

FIG. 5 is a top plan view; and

FIG. 6 is a bottom plan view thereof.

The ornamental design for a wristwatch, as shown and described.